Draft attachment for stoves



J. H. DEAN.

DRAFT ATTACHMENT FOR STOVES,

APPLICATION FILED AUG-30. 1919.

Patented Jan. 13, 1920.

JAMES H. DEAN, or CHICAGO, ILLINOIS, ASSIGNOR. TO COLE'MANUFACTITRING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION.

DRAFT ATTAOI-IMEN T FOB STOVES.

Specification of Letters Patent. Pat nted Jan. 13, 1920.,

Application filed August 30,1919. Serial No. 320,845.

To all whom it may concern:

Be it known that 1, JAMES H. DEAN, a citizen of the United States, and a resident of Chicago, county of. Cook, and State of Illinois, have invented certain new and useful Improvements in Draft Attachments for Stoves, of which the following is a specification.

, The invention relates to draft devices for stoves and seeks to provide simple and effective means by which heated air can be directed downwardly onto the burning material in the fire box or combustion chamber of the stove to thereby increase combustion and also by which air can be delivered upwardly into the smoke pipe of the stove to check or decrease the draft. The invention consists in the features of improvement hereinafter set forth, illustrated in the pre ferred form in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a vertical section through a stove with the improved draft attachment applied thereto. Fig. 2 is a vertical, detail section on the line 22 of Fig. 1Q Fig. 3 is a horizontal section on the line 33 of Fig.2.

The stove may be of any usual or suitable construction. The form shown comprises a casing 1 mounted on a suitable base 2 and provided with a fire box 3, ash pit 5 and doors 6 and 7 opening, respectively, into the combustion chamber and ash pit of the stove, the door 7 being-provided with a sliding damper 8 for regulating the admission of air to the ash pit beneath the fire box. The upper rear portion of the stove is provided with a collar 9 which engages the lower end of a suitable smoke pipe 10.

The improved draft attachment is mounted in the upper rear portion of the stove casing and comprises a flue casing 11 which is preferably U-shaped in cross section and is secured in vertical position to the inner face of the back wall of the stove casing, and the latter is provided with an air inlet or opening 12 over which the central portion of the flue casing extends. The U- shaped flue casing is preferably formed of sheet metal and is provided at its edges with flanges 13 by which it is attached, by means of bolts or rivets 14, to the stove casing.

The upper open end of the flue casing 11 terminates within the smoke pipe collar 9 ran srarns rnrnnir orrron I I and its lower open end terminates somewhat above' the fire box 3, and these open ends of the flue casing formair outlets which communicate, respectively, with the smoke pipeand combustion chamber of the stove. The flue casing isdivided intoupperand lower flue portions 15 and 16, preferablyby means ofa valve 17, which-also controls the admission of air to either of the flue por-v tions, I

In the preferred construction shown, the valve 17 is cylindrical orcup-shapedandits open outer end is in communication with the air inlet 12. Preferably, as shown,,tl- 1ecylindrical valve extends through the air inlet 12 andflts betweenthe side walls of the flue casing 11, the latter being provided with curved portionsor seats1S- for-the valve.

At its outer end the valve is provided with Y a peripheral flange 19 which overlaps the outer face of the stove casing 1 and the closed inner end of thevalve is provided with a pintle20 which rotatablyengages a suitable-opening in the inner wall of the flue casing v 11. A pin 21 extends through the pintle and serves to hold the rotatable cylindrical valve in position; The peripheral wall of the cylindrical valve is provided with a port 22 and by rotating the valve,

the'port may be'brought into register either with the upwardly directedvflue portion 15 or with the downwardly directedi fl ue .pon-

tion 16 of the casing 11. For convenience 16 onto the burning material in the fire box to increase combustion, or air may be directed upwardly through the flue portion 15 to the smoke pipe 10 to thereby decrease or check the draft through the stove. Also,

as noted, the valve may be positioned to cut,-

ofl the flow of air entirely fromthe flue casing.

Obviously, the parts of the improved draft attachment can be economically manufac tured and readily assembled. The details set forth can be varied without departure from the essentials of the invention as defined in the claims.

I claim as my invention 1. In a draft attachment for stoves, the

combination ofthe stove casing, a straight flue casing of substantially uniform U-shape in cross section secured in vertical position to the inner face of said stove casing, said flue casing being divided into upper and lower portions arranged in vertical alinement and having outlets opening respectively into the smoke pipe and the combustion chamber at a point above the fire, said stove casing having a common air inlet for said flue portions, and a valve arranged within said flue casing and having means for closing either or both of said flue portions and for controlling the admission of air from said common air inlet to one or the other of said flue portions, substantially as described.

2. In a draft attachment for stoves, the combination of a stove casing, a vertically disposed, open-ended flue casing arranged on one side of said stove casing, and a shifta'ble valve member dividing said easing into upper and lower flue portions adapted to deliver air to the smoke pipe'or to the combustion chamber at a point above the fire, said valve member being arranged to control the admission of air to one or the other of said flue portions, substantially as described.

3. In a draft attachment for stoves, the combination of a stove casing having an air inlet, a flue casing of U-shaped cross section secured to the inner face of the stove casing over said air inlet, and a common valve member dividing said flue casing into separate flue portions extending upwardly and downwardly from said air inlet and adapted to deliver air to the smoke pipe or to the combustion chamber at a point above the fire, said valve member being arranged to close either or both of said flue portions or control the admission of air from said inlet to one or the other of said flue portions, substantially as described.

4. In a draft attachment for stoves, the combination of the stove casing, a vertically disposed flue casing arranged within and on one side of the stove casing, said flue casing being divided into upper and lower portions having a common air inlet and separate outlets opening respectively into the smoke pipe and the combustion chamber at a point above the fire, and a cylindrical valve arranged within said valve casing and having an open outer end communicating with said air inlet and said cylindrical valve having a peripheral wall for closing either or both of said flue portions and provided with a port adapted to register with one or the other of said flue portions for placing the same. in communication with said common air inlet, substantially as described.

5. In a draft attachment for stoves, the combination of the stove casing having an air inlet, a substantially vertical flue casing of U-shaped cross section secured to the inner face of the stove casing over said air inlet, said valve casing having outlets at its ends opening respectively into the smoke pipe and the combustion chamber at a point above the fire, and a rotatable, cylindrical valve fitting withinsaid flue casing, communicating at its outer end with said air inlet and having'means for cutting off the flow of air through said flue casing or for directing the air either upwardly or downwardly therethrough, substantially as described.

6. In a draft attachment for stoves, the combination of the stove casing having an air inlet, a substantially vertical flue casing of U-shaped cross-section secured to the inner face of the stove casing over said air inlet, said valve casing having outlets at its ends opening respectively into the smoke pipe and the combustion chamber at a point above the fire, and a rotatable, cylindrical valve open at its outer end and extending through said air inlet into said flue casin to divide the latter into upper and lower ue portions, said valve having means for closing either or both of said flue portions and for controlling the flow of air through either portion, substantially as described.

JAMES H. DEAN. 

